class_docstr: Tests for the probs_to_unitary function
docstr: Test if a ValueError is raised when a distribution with a negative value is input
docstr_tok: ["Test","if","a","ValueError","is","raised","when","a","distribution","with","a","negative","value","is","input"]
code: def test_invalid_distribution_negative(self):
      """Test if a ValueError is raised when a distribution with a negative value is input"""
      p = [2, 0, 0, -1]
      with pytest.raises(
          ValueError,
          match="A valid probability distribution of non-negative",
      ):
          probs_to_unitary(p)
  
imports: import numpy
  import pytest
  from scipy.stats import norm
  import pennylane
  from pennylane.templates.subroutines.qmc import QuantumMonteCarlo, _make_V, _make_Z, func_to_unitary, make_Q, probs_to_unitary
  from pennylane.wires import Wires
label_desc: Use image node_id 2 for calling the TestProbsToUnitary obj's underlying member method code with example usage: obj.test_invalid_distribution_negative() without return types